/*
 * This is Melet, a salary slip designer. Feed it with data regarding to salary payment, prepare it for print through the graphical presentation, and you have it done.
 * Copyright (C) 2014, AFDiaX
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This program is based on UMLet, a Free UML Tool for Fast UML Diagrams.
 * To contact the authors of UMLet visit https://code.google.com/p/umlet/people/list
 * To contact the authors of Melet visit https://gna.org/users/gabocze
 */
package com.baselet.element.facet.specific;

import java.util.Arrays;

import com.baselet.control.basics.geom.Dimension;
import com.baselet.control.basics.geom.PointDouble;
import com.baselet.diagram.draw.DrawHandler;
import com.baselet.element.facet.KeyValueFacet;
import com.baselet.element.facet.PropertiesParserState;

public class StateTypeFacet extends KeyValueFacet {

	public static final StateTypeFacet INSTANCE = new StateTypeFacet();

	private StateTypeFacet() {}

	private enum ActionTypeEnum {
		STATE, SENDER, RECEIVER
	}

	@Override
	public KeyValue getKeyValue() {
		return new KeyValue("type",
				new ValueInfo(ActionTypeEnum.STATE, "a default state"),
				new ValueInfo(ActionTypeEnum.SENDER, "an action which sends a signal"),
				new ValueInfo(ActionTypeEnum.RECEIVER, "an action which receives a signal"));
	}

	@Override
	public void handleValue(final String value, final DrawHandler drawer, final PropertiesParserState state) {
		ActionTypeEnum type = ActionTypeEnum.valueOf(value.toUpperCase());
		Dimension s = state.getGridElementSize();
		if (type == ActionTypeEnum.STATE) {
			return; // default
		}
		else if (type == ActionTypeEnum.SENDER) {
			drawer.drawLines(Arrays.asList(p(0, 0), p(s.width - depth(s), 0), p(s.width, s.height / 2.0), p(s.width - depth(s), s.height), p(0, s.height), p(0, 0)));
		}
		else if (type == ActionTypeEnum.RECEIVER) {
			state.addToLeftBuffer(depth(s));
			drawer.drawLines(Arrays.asList(p(0, 0), p(s.width, 0), p(s.width, s.height), p(0, s.height), p(depth(s), s.height / 2.0), p(0, 0)));
		}
		state.setFacetResponse(StateTypeFacet.class, true);
	}

	public static void drawDefaultState(final DrawHandler drawer, Dimension s) {
		int radius = Math.min(20, Math.min(s.width, s.height) / 5);
		drawer.drawRectangleRound(0, 0, s.width, s.height, radius);
	}

	private double depth(Dimension s) {
		return s.width / 5.0;
	}

	private PointDouble p(double x, double y) {
		return new PointDouble(x, y);
	}

}
